Polymer Chemistry
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2022
·Vol. 13
·期 24
·3639-3649
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IF 5.364
Rui Yang,Lin Xie,Nan Li,Pablo Froimowicz,Kan Zhang
A novel triptycene-containing dioxazine benzoxazine monomer (TB-al) and a main-chain triptycene-containing dioxazine benzoxazine copolymer (poly(triptycene-containing dioxazine benzoxazine-co-polydimethylsiloxane), TB-al-co-PDMS) have been synthesized and fully characterized. Polymerization of the monomer, TB-al, and the copolymer, TB-al-co-PDMS, was studied by in situ FT-IR and DSC. Fire-related properties and thermal stability of the resulting thermosets were evaluated by TGA and micro-scale combustion calorimetry (MCC). The obtained thermosets, poly(TB-al) and poly(TB-al-co-PDMS), exhibit outstanding thermal stability with Td10 values of 320 and 450 °C, char yields of 44 and 72% at 800 °C, low flammability as determined by HRC, affording values of 69.6 and 31.6 J g−1 K−1, and THR values of 10.5 and 9.4 kJ g−1, respectively. Remarkably, poly(TB-al-co-PDMS) presents excellent dielectric performance with a dielectric constant of 2.37 at 1 MHz and good hydrophobicity revealed by the low water uptake value of 0.056% after 120 h of sample immersion in water at room temperature. The combined properties and advantages of these triptycene-based thermosets (poly(TB-al) and poly(TB-al-co-PDMS)) clearly indicate their great potential for applications in the field of high-performance polymers.
研究领域:
高分子化学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2019
·
IF 3.858
Tiantian Shi,Meiling Qi,Xuebin Huang
Developing highly selective stationary phases is essential to address the issues for separation of analytes with similar properties and various components in complex samples. Herein, we report a new triptycene-based material functionalized with polycaprolactone moieties (TP-PCL) as the stationary phase with high-resolution performance for gas chromatography (GC). The TP-PCL capillary column exhibited column efficiency of 5555 plates/m and moderate polarity. On the column, dozens of mixtures of positional and structural isomers can be well resolved, involving benzene derivatives with varying substituents (alkyl, halo, nitro, hydroxyl, amino), naphthalene derivatives, alkanes and alcohols. It exhibits advantageous performance for high resolution of the critical pairs of alkylbenzenes, phenols, anilines and alkanes over the PCL column and commercial DB-35 MS column with similar polarity. Moreover, the TP-PCL column showed excellent separation repeatability and reproducibility with RSD values of 0.02%−0.07% for run-to-run ( n = 4), 0.11%−0.18% for day-to-day ( n = 4) and 2.1%−4.7% for column-to-column ( n = 4). In addition, it exhibited distinctly enhanced thermal stability in contrast to the PCL column. Its application to analysis of the essential oil from Artemisiae argyi proves its good potential for practical use.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Jingfa Zhang,Yongchao Sun,Fangxu Fan,Qizheng Zhao,Gaohong He,Canghai Ma
Thermally rearranged (TR) polymers have seen a growing role in gas separation membranes . Further exploitation of TR membranes with enhanced mechanical properties and gas separation performance are urgently demanded. Herein, a new series of TR polymers incorporating rigid triptycene units were prepared containing amino-functionalized neighbored benzene propellers and thermally rearrangeable o-hydroxy groups. The resultant TR membranes exhibit increased chain d-spacing and gas permeability with the increase of thermal arrangement temperatures. Moreover, the presence of triptycene enhances the mechanical strength of TR polymers due to the π-π stacking effect of triptycene moieties. The 400 °C TR polymer 6FDA-6FAP:DAT(2:1) displays a H 2 permeability of 345.3 Barrer with a H 2 /CH 4 selectivity of 83.6, 440% and 118% higher than the precursor, respectively, exceeding the latest Robeson upper bound. The design principle of TR membranes in this work provides an alternative route for the development of mechanically robust and high performance membranes with potentials for energy efficient gas separations.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Qing-Pu Zhang,Hua-Wen Peng,Hui Ma,Yu-Ling Sun,Qiang Zhao,Chuan-Feng Chen,Chun Zhang
For antibiotics, the purification and separation in the synthesis process, as well as enrichment and recycling in the utilization process, has a profound impact on human health and environmental issues, which pose an unignorable challenge for selective molecular sieving of separation technology. Herein, we offered a convenient high-accuracy separation membrane construction by using three dimensional rigid triptycenes as building-blocks to fabricate porous triptycene networks polyarylate nanofilms (PTN-NFs) by interfacial polymerization. With permanent porous structure and excellent stability, the PTN-NF membrane exhibited remarkable separation precision around 90 g mol −1 scale for several mixture separation and significant selectivity as high as 39.3 for piperacillin/6-aminopenicillanic acid (6-APA) separation.
研究领域:
材料科学
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环境科学
·
医药工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2018
·
IF 3.716
Yinhui Yang,Meiling Qi,Jinliang Wang
This work describes the separation performance of a star-shaped truxene-based material (denoted as EDOTT) as the stationary phase for capillary gas chromatography (GC). The EDOTT capillary column achieved the column efficiency of 5920 plates/m by n -dodecane, 4890 plates/m by naphthalene and 3960 plates/m by 1-octanol at 120 ℃. Its selectivity and retention behaviour were investigated by a number of mixtures of diverse analytes and their isomers. As a result, it showed advantageous performance for separations of apolar to polar analytes, especially phenols and alcohols, over its analogous TTT, TDT and TFT stationary phases. In addition, the EDOTT capillary column was investigated for its column loadability, repeatability and thermal stability, and was finally applied for the determination of isomer impurities in real samples. This work provides an alternative truxene-based stationary phase with high selectivity for polar analytes and demonstrates the key role of structural modification in developing a family of stationary phases with specific selectivity for targeted analytes.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 9
·5587-5594
·
IF 4.036
Yan He,Wenli Bao,Yingcen Hua,Zhulei Guo,Xiaolei Fu,Bing Na,Dingzhong Yuan,Changjun Peng,Honglai Liu
It is still a great challenge to develop new materials for the highly efficient entrapment of organic dyes from aqueous solution. Herein, a novel triptycene-based hyper-crosslinked porous polymer (TPP–PP) was designed and synthesized by a simple Friedel–Crafts reaction. The obtained polymer TPP–PP has a high surface area, abundant pore structure and stable thermal performance. Due to the above characteristics, TPP–PP has good adsorption performance for anionic methyl orange solution (MO) and cationic methyl blue solution (MB). Under the optimal experiment conditions, the TPP–PP showed an excellent adsorption capacity for MO (220.82 mg g−1) and MB (159.80 mg g−1), respectively. The adsorption kinetics fitted the pseudo-second-order model. The adsorption of MO by TPP–PP reaches equilibrium within 180 minutes, and the adsorption of MB reaches equilibrium within 150 minutes. The adsorption behavior was not only spontaneous but also endothermic in reality. At the same time, TPP–PP also has good reusability. After 5 cycles of experiments, the removal rate of MO and MB by TPP–PP can still reach more than 80%. Thus, the Friedel–Crafts reaction crosslinked method might be a promising approach for the synthesis of novel material for the highly efficient extraction of dye wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Gen Lin Wang,Yi Yang Zhang,Lei Duan,Ke Hong Ding,Zhi Feng Wang,Ming Zhang
In this paper, we report an effective method for the preparation of polydimethyl siloxane (PDMS) containing only 0.5 wt % π -conjugated truxene micromolecule. The as-prepared truxene/PDMS composite had high dieletric constant (k) due to the regularly rigid structures, special π -conjugated structure and monodisperse nature of truxene, which can form a large no. of parallel micro-capacitors under actuated electric field. In addition, the elastic modulus of truxene/PDMS composite was increased slightly only with a good flexibility. As a result, compared to pure silicone elastomer (4.52%), the truxene/PDMS composite exhibited a greater strain of 11.56% at a low electric field of 5.5 V/μm (about 2.56 times increase).
研究领域:
材料科学
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电气工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 17
·7594-7601
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IF 3.591
Yongrui He,Meiling Qi
This work presents a novel strategy for the construction of a capillary column with high resolving performance and inertness for gas chromatographic (GC) analysis by combining the proposed surface modification with a selective stationary phase. Through the modified biphasic sol–gel reaction inside a capillary GC column, porous modification was made on the capillary surface (PM capillary) prior to coating with a stationary phase. Herein, we designed and synthesized a new triptycene-based stationary phase (TPPG) for the study. Using the proposed strategy, the PM-TPPG column was fabricated with a column efficiency of 4950 plates per m determined by n-dodecane at 120 °C and then investigated for its separation performance, inertness, repeatability, loadability and thermal stability. As demonstrated, the PM-TPPG column showed distinct advantages in these aspects over two reference columns (TPPG column and commercial PEG column). Particularly, the PM-TPPG column well resolved all the components in the Grob mixture and exhibited distinctly improved peak shapes for carboxylic acids and heterocyclic bases. Moreover, it exhibited excellent repeatability and reproducibility and higher column loadability than the two reference columns. Its applications to purity monitoring of chemical products demonstrate its good potential for practical GC analysis.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2017
·
IF 4.95
Yinhui Yang,Qinsi Wang,Meiling Qi,Xuebin Huang
Triptycene-based materials feature favorable physicochemical properties and unique molecular recognition ability that offer good potential as stationary phases for capillary gas chromatography (GC). Herein, we report the investigation of utilizing a π -extended triptycene material (denoted as TQPP) for GC separations. As a result, the TQPP capillary column exhibited high column efficiency of 4030 plates m −1 and high-resolution performance for a wide range of analytes, especially structural and positional isomers. Interestingly, the TQPP stationary phase showed unique shape selectivity for alkanes isomers and preferential retention for analytes with halogen atoms and H-bonding nature mainly through their halogen-bonding and H-bonding interactions. In addition, the TQPP column had good repeatability and reproducibility with the RSD values of 0.02–0.34% for run-to-run, 0.09–0.80% for day-to-day and 1.4–5.2% for column-to-column, respectively, and favorable thermal stability up to 280 °C. This work demonstrates the promising future of triptycene-based materials as a new class of stationary phases for GC separations.
研究领域:
分析化学
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材料科学
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2024
·Vol. 70
·期 8
·e18471
·
IF 3.5
Xiaoyu Wang,Fangxu Fan,Yongchao Sun,Jingfa Zhang,Canghai Ma,Gaohong He
Polymer-based membrane technology holds immense promise for CO 2 separation. However, it faces persistent challenges, including the high CO 2 pressure-induced plasticization and permeability-selectivity trade-offs, which significantly hinder the development of polymeric membranes. To tackle this issue, we synthesized a novel polyimide 6FDA-DAT:DABA(6FDD) containing triptycene and carboxylic groups. Upon de-carboxylation induced cross-linking, the membrane demonstrated a simultaneous enhancement of gas permeability and selectivity. Specifically, compared to the uncross-linked 6FDD, the 400°C-24 h cross-linked membrane exhibited a remarkable increase in CO 2 permeability by 177% (93.1 Barrer) and a significant rise in CO 2 /CH 4 selectivity by 47% (57.5), reaching the CO 2 /CH 4 upper bound. More importantly, the cross-linked membrane displayed vastly improved CO 2 plasticization resistance, withstanding up to 42 bar of CO 2 feed pressure. The design of decarboxylated cross-linked membranes in this work paves the way for creating high-performing and plasticization-resistant membranes with potential applications in high-pressure CO 2 separations.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Lining Yu,Jun He,Meiling Qi,Xuebin Huang
This work reports a new type of triptycene-based amphiphilic stationary phase (TP-2IL) for gas chromatography (GC). It is an integration of the 3D π-rich triptycene framework with ionic liquids. Its capillary column showed the efficiency of 3880 plates/m determined by n -dodecane at 120 °C (k = 2.79) and exhibited good performance for analytes from apolar to polar nature. Particularly, it has outstanding capability for resolving critical pairs of anilines and phenols with good peak shapes and shows distinct advantages over its composing counterparts (TP-2BO and O-IL) and widely-used commercial columns, namely 35% phenyl methyl polysiloxane (DB-35) and polyethylene glycol (INNOWAX). Moreover, the TP-2IL column exhibited good repeatability and reproducibility with the values of relative standard deviation in the range of 0.02%–0.07% for run-to-run, 0.10%–0.35% for day-to-day and 2.9%–5.1% for column-to-column, respectively, and good thermal stability up to 300 °C. Furthermore, its applications for determining isomer impurities in real samples demonstrate its feasibility for practical GC analysis. This work presents a facile strategy for constructing triptycene-based stationary phases with amphiphilic selectivity and provides alternatives of highly selective stationary phases for chromatographic analysis.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Jun He,Lining Yu,Xuebin Huang,Meiling Qi
This work presents the investigation of two triptycene-based materials (TP-3OB and TP-3Im) as the stationary phases for gas chromatographic (GC) separations. The TP-3OB and TP-3Im capillary columns fabricated by static coating exhibited column efficiency of 3000–3500 plates/m for n -dodecane at 120 °C. Also, their McReynolds constants and Abraham system constants were determined to characterize their polarity and molecular interactions with analytes. On the basis of the unique 3D TP architecture, the TP-3OB and TP-3Im stationary phases exhibited complementary high-resolution performance for analytes of a wide ranging polarity, including alkylbenzenes , alkylnaphthalenes, halobenzenes, phenols and anilines, respectively. Moreover, the TP-based columns exhibited good repeatability and reproducibility on the retention times of analytes with the relative standard deviation (RSD) values in the range of 0.01–0.14% for run-to-run, 0.11–0.47% for day-to-day and 0.68–4.7% for column-to-column, respectively. Additionally, their applications for the determination of isomer impurities in the commercial reagents of o- dichlorobenzene , p-/m- diethylbenzene, o -toluidine and 2,3 -/ 3,5-xylidine proved their good potential for practical analysis. This work demonstrates the promising future of the triptycene-based stationary phases for chromatographic separations.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）